2d.line.width.transformed.worker.js

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This WPT test may be referenced by the following Test IDs:
- /html/canvas/offscreen/line-styles/2d.line.width.transformed.worker.html - WPT Dashboard Interop Dashboard

// DO NOT EDIT! This test has been generated by /html/canvas/tools/gentest.py.

// OffscreenCanvas test in a worker:2d.line.width.transformed

// Description:Line stroke widths are affected by scale transformations

// Note:

importScripts("/resources/testharness.js");

importScripts("/html/canvas/resources/canvas-tests.js");

var t = async_test("Line stroke widths are affected by scale transformations");

var t_pass = t.done.bind(t);

var t_fail = t.step_func(function(reason) {

    throw reason;

});

t.step(function() {

  var canvas = new OffscreenCanvas(100, 50);

  var ctx = canvas.getContext('2d');

  ctx.fillStyle = '#0f0';

  ctx.fillRect(0, 0, 100, 50);

  ctx.lineWidth = 4;

  // Draw a green line over a red box, to check the line is not too small

  ctx.fillStyle = '#f00';

  ctx.strokeStyle = '#0f0';

  ctx.fillRect(15, 15, 20, 20);

  ctx.save();

   ctx.scale(5, 1);

   ctx.beginPath();

   ctx.moveTo(5, 15);

   ctx.lineTo(5, 35);

   ctx.stroke();

  ctx.restore();

  // Draw a green box over a red line, to check the line is not too large

  ctx.fillStyle = '#0f0';

  ctx.strokeStyle = '#f00';

  ctx.save();

   ctx.scale(-5, 1);

   ctx.beginPath();

   ctx.moveTo(-15, 15);

   ctx.lineTo(-15, 35);

   ctx.stroke();

  ctx.restore();

  ctx.fillRect(65, 15, 20, 20);

  _assertPixel(canvas, 14,25, 0,255,0,255);

  _assertPixel(canvas, 15,25, 0,255,0,255);

  _assertPixel(canvas, 16,25, 0,255,0,255);

  _assertPixel(canvas, 25,25, 0,255,0,255);

  _assertPixel(canvas, 34,25, 0,255,0,255);

  _assertPixel(canvas, 35,25, 0,255,0,255);

  _assertPixel(canvas, 36,25, 0,255,0,255);

  _assertPixel(canvas, 64,25, 0,255,0,255);

  _assertPixel(canvas, 65,25, 0,255,0,255);

  _assertPixel(canvas, 66,25, 0,255,0,255);

  _assertPixel(canvas, 75,25, 0,255,0,255);

  _assertPixel(canvas, 84,25, 0,255,0,255);

  _assertPixel(canvas, 85,25, 0,255,0,255);

  _assertPixel(canvas, 86,25, 0,255,0,255);

  t.done();

});

done();